21362093 has 4 divisors (see below), whose sum is σ = 21425820. Its totient is φ = 21298368.

The previous prime is 21362057. The next prime is 21362113. The reversal of 21362093 is 39026312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11546404 + 9815689 = 3398^2 + 3133^2 .

It is a cyclic number.

It is not a de Polignac number, because 21362093 - 2¹² = 21357997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21362293) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31358 + ... + 32031.

It is an arithmetic number, because the mean of its divisors is an integer number (5356455).

Almost surely, 2^21362093 is an apocalyptic number.

It is an amenable number.

21362093 is a deficient number, since it is larger than the sum of its proper divisors (63727).

21362093 is an equidigital number, since it uses as much as digits as its factorization.

21362093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63726.

The product of its (nonzero) digits is 1944, while the sum is 26.

The square root of 21362093 is about 4621.9144301902. The cubic root of 21362093 is about 277.4690840217.

The spelling of 21362093 in words is "twenty-one million, three hundred sixty-two thousand, ninety-three".